back breaker

• 指极其耗费体力或脑力、常令人精疲力竭或不堪重负的任务、工作或责任。

A task, job, or responsibility that is extremely physically or mentally demanding, often causing exhaustion or strain.

1. Extremely difficult taskB2informal

   A task or job that is physically or mentally exhausting and very hard to complete.

   苦差事

   • Moving all this furniture upstairs is a real back breaker.
   • Writing a 100-page report in one day was a back breaker.
   • The final exam was a back breaker for most students.

2. Decisive blow or final strawC1informal

   The final difficulty or problem that makes a situation unbearable or causes failure.

   最后一根稻草

   • The unexpected tax bill was the back breaker for his business.
   • Her constant criticism was the back breaker that ended their friendship.
   • The injury was the back breaker for his athletic career.